Chock block



F. ARN.

CHOCK BLOCK.

ABPLICATION FILED APH. 13, |920.

1,403,585. Patented Jan. 17,1922. i

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UNITED STATES PATENT oFFlcs.-

FBEDAIRN, 0F CHATTANOOGA, TENNESSEE, `ASSIGNOIRL TO J'. M. CARD LUMBERCO.,` 0F CHATTANOOGA, TENNESSEE, A. CORPORATION OF TENNESSEE.

CHUCK BLOCK.'

'Specication of Letters Patent. i Patented 33111.17, 1922.

Application led 'April 13, 1920, Serial No. 373,517`

To all whom t may concern:

Be it known that I, FRED ARN, a citizen of the United States, andresident of C-hattanooga, county of Hamilton, State of Tennessee, haveinvented certain new and useful Improvements in' Ohock Blocks, of whichthe following is a specification.

My invention relates to -chock blocks used in transporting automobilesfor holding them on the car ioor.

One object of my invention is to provide a block which is capable ofbeing made at a highrate of production, will provide means whereby thenails which are employed for aflixing the blo'ck to the floor, may bereadily positioned to be driven substantially perpendicular to the ioorand which will permit the hammer blows to be applied without requiringunusual care or skill on the part of the workman, and will present alarge surface area on its bottom 'ace for Contact with the iloor andwill have an extending rear heel portion providing a bearing part wellin the rear of the upper portion of the block.

The invention is shown in the accompany-- ing` drawings in which igurel' is a side elevation of the block and Fig. 2 a perspective view.

These blocks are made from wooden timbers, they are of solid formationand are of such form that the can be expeditiously produced. Each b ockcomprises vertical sides l, a base 2 and a curved front face 3, which isgrooved lengthwise so as to conform substantially to the curve of thetire of the wheel which is to be checked by the block. The block has avertical rear face 5 and an extension 6 at the lower portion of thisvertical rear face, said extension projecting rearwardly therefrom. Theupper 'face of this extension is substantially horimer blows y ordriving the nail through the block and through the floor of the car onwhich the automobile is to beltransported. This rear extension also'provides an addition to the lower or base face of the block so that thelower face which comes in contact withthe door of the car will be ofconsiderable area and -will thus have a better holding effect or contactwith the car floor. This rear heel extension'will also provide a bearingwell towards the rear of the vertical face and the top of the block sothat it will be impossible for the block to tip up towards the rearunder the pressure from the wheel of .the automobile. Ordinarily thepull on an automobile chock block is such that there is a tendency todraw out the nails if these are driven in diagonally or in other wordsinclined downwardly and towards the front of the block. It has beenvfound in tests that the perdendicular nail has the greatest strengthand holding power, andthe extension heel on the present block enablesthe nail to be driven in a position perpendicularpto the floor.

One advantage of the present construction is that although the block isprovided with a rear extension for receiving the nails l insubstantially perpendicular position the block is light in weight,because of the material which is cut out in forming the vertical faceand the extension heel. It will be obvious that if the extension weremade by inclining the rear face from the upper e ge of the block to therearmost point, for instance, along the dotted line m, in Figure 1, thematerial left in the space y would add to the weight of the block andwhen it is considered that these blocks are made in enormous quantitiesand shipped in car load lots, the comparatively smallsaving in Weight ineach individual block constitutes a great saving in weight and inmaterial when it is considered that thesel blocks are made and shippedin the large quantities mentioned.

I claim as my invention:

A chock block for automobiles consisting of a solid piece of wood havinga horizontal lower face and a curved front face, a rear face and a heelextension at the lower portion of the rear face projecting rearwardlytherefrom beyond the rearmost vertical plane touching said rear face andin line sion, the said upper face of the heel eXtension terminating at apoint above the plane of the lower face of the block substantially 1 0as described.

In testimony whereof, I aiix my signature.

FRED ARN.

